Mixing-machine.



J. J. GREEN.

MIXING MACHINE.

APPLIUATION FILED JUNI: 29, 1911.

Patented Mar. 5.1912.

2 SHEETS-SHEET 1.

I a A c l Jima/@n J. J. GREEN.

MIXING MACHINE.

APPLIUATION FILED 111111129, 1911.

Patented Mar. 5, 1912.

2 SHEETS-SHEET 2.

- Jmfi, imn @7; 15766724 JOSHUA J. GREEN, OF SHREVEPORT, LOUISIANA.

MIXING-MACHINE.

Specification of Letters Patent.

Application med June 29, 1911. serial No. 635,989.

To all whom t may concern:

Be it known that I, JOSHUA J. GREEN, of Shreveport, in the parish ofCaddo and State of Louisiana, have invented certain new and usefulImprovements in Mixing- Machines, of which the following is aspecification.

My invention has to do with mixing machines, wherein the materials aremixed or blended in a dry state, as is the case in preparing fertilizer,feed, cement, breakfast food and the like, the materials usually beingin finely divided or comminuted condit-ion.

The main characteristic of my machine resides in the devices andcombination of devices employed to form the bowl or trough in which thematerials are mixed, and in the appliances used in connection therewith.

The bottom and back of the trough are formed by a traveling endlessapron and its heads or ends are formed by disks mounted t-o revolve bycontact with the apron so as to move in unison therewith andconstituting guides under and partly up around which the apron passes,said disks serving to depress the apron more or less as desired toprovide a concave'bottom to the bowl, and the apron passing rearwardlyup and partly around the guide disks to form a back for the bowl. Thematerial dumped into the bowl will be carried along with the apron,ascending therewith until by gravity it falls back into the bowl, beingthus in effect rolled over and over on itself as it continuously dropsfrom the upwardly moving back of the bowl. Tith the apron is preferablycombined a suitable knocking or agitating appliance whereby the portionof the apron which forms the back of the bowl is agitated or jolted inorder' to shake this portion ofthe apron clean. These and other featuresof my invention can however best be explained in connection with theaccompanying drawings to which I shall now refer for a betterunderstanding of my improvements.

In said drawings- Figure l is a perspective view of a mixing machineembodying my improvements. Fig. 2 is a vertical central section of thesame. Fig. 3 is a transverse sectional elevation representing the idlerdisks or wheels which form the ends of the mixing trough, the reversespiral convey ers, and the shaft upon which the same are mounted. Figs.4f and l5 are views illusratenteaiuar. 5,1912. l

to which are appropriately attached cross- A slats a (overlapping ifdesired). For use with fertilizer, or other acid materials, the apronmay have a canvas cover b saturated with parafiin to resist the actionof the acid.

Other constructions of apron may be used without departure from myinvent-ion. The apron passes up over sprocket wheels D, down undersprocket idlers I, forward to and up around the sprocket wheels D, overguide wheels Gr, under and up the back por tion of idler guide disks W,thence back to wheels D, passing on the way thereto over a small portionof the peripheries of idler sprocket wheels B, which deflect the apronslightly to the rear and out of a straight lineat a point between whereit leaves the guide disks W, and where it meets the sprocket wheels D,these wheels B in connection with the sprocket chains of the apronserving as knockers or bumpers to jolt and shake the-` apron. A similarcontrivance B for the under ply of the apron is located between theWheels D and I. All of these sprockets and other wheels and disks aresuitably mounted in the frame of the machine. Under thisarrangement theendless apron has a horizontal portion, a depressed portion forming theconcave bottom of the bowl and an upright or substantially uprightportion forming the back wall of the bowl. The front rim of the-- bowlis dened by the idler guide wheels G y over which the chains of theapron pass. The apron is thence deected downward by the larger idlerdisks W (preferably of wood) which meet the apron and are revolved bycontact therewith. These disks which form the heads or ends of themixing trough or bowl, are mounted loosely upon a shaft C, upon whichare fixed reverse spiral conveyers c of suitable type, which when theHshaft revolves in the mixing operation, tend to carry the material inthe trough from the ends toward the center. The shaft C- is driven inany suitable way-as for example, from one of the bumper sprocket wheelsB, by suitable chain gearing as shown.

The materials to be treated are delivered to the machine upon thehorizontal portion of the apron in front of the bowl or trough, theapron, at this time, traveling in the direction of the arrow, Fig. 2.They may be thus delivered in any suitable way by elevators, conveyersor other desired means of delivery. In this instance, inasmuch as themachine is supposed to be installed above the floor level, lI provide anelevated dumping platform approached by inclined runways for wheelbarrow travel, and having a dumping hole J (preferably cattle-guardedfor safety as shown) through which the material is deliveredto theapron.

rIhe shaft on which the sprockets D are mounted has on it a drivingwheel E, around which passes a driving belt F, driven from suitablesource of power. The shaft on which the sprockets D are mounted has onit a corresponding wheel E, and driving belt F. A tightener idler E2 orE3 is provided for each belt, the two being connected by suitableintermediaries to an operating lever L, whereby either tightener idlercan be operated to tighten its belt, while the other belt runs loose, asusual in mechanism of this character. When belt F is tightened apron Ais driven by the sprockets D in the direction of the arrow, Fig. 2,conveying the material from the dumping point to the mixingpoint-sprockets D running as idlers. When on the other hand belt F istightened, apron A is driven in a reverse direction by the sprockets D',carrying the mixed material from the mixing point to the dumping point,whence it is discharged and taken care of by suitable conveyers or otherappliances-the sprockets D, at this time, running as idlers. In this waythe materials to be mixed or blended can be readily conveyed from thedumping to the mixing point, can be there thoroughly and expeditiouslymixed, and can then be returned wit-h equal vfacility to the dumpingpoint or other point of discharge from the machine.

During the mixing operation the material inthe mixing trough or bowl iscarried up along with the apron until it` reaches the perpendicular or aposition so nearly approachingV the perpendicular that by gravity itwill detach itselfV from the apron and drop back, the charge thus beingrolled over and over upon itself insuring speedy and thorough mixture.Some materialmay still cling to Vand bel carried off with the ascendingapron, and to remove this material I employ means for agitating orjolting the portion of the apron where this is liable to occur. Anysuitable agitating or shaking means can be employed for the purpose. Iprefer to employ for this purpose the bumper sprockets B alreadyreferred to. These sprockets are of small diameter and are mounted asidlers to engagev the sprocket chains of the endless apron A, and theyslightly defiect the apron from a straight .line between the pointswhere it leaves the disks W and meets the sprockets D. The

links of the chain are preferably quite long, each link having,preferably, say an opening of some six inches in length; and thesprocket B is so proportioned to the chain that the cross bolt or pin orroller, uniting the adjoining ends of-any two links, will have left itsseat on the sprocket before the next succeeding cross bolt, pin orroller has seated itself on the sprocket, there being thus a briefinterval of time in which the chain can drop forward, the side bars ofthe link straddling momentarily the sprocket wheel B, as in Fig. l-,until the following cross bolt or roller vhas seated itself on thesprocket, and again pushed back the chain as in Fig. 5. In this way, asthe apron moves along, it is, at the point where the sprockets B arelocated, continuously bumped or jolted, with the result of keeping thatportion of the apron in such agitation as to effectively shake off theadhering dust. A similar contrivance is employed at B on the under sideof the lower ply of the endless apron-this contrivance being of use whena reverse drive is imparted to the apron.

The smaller the sprockets B relatively to the chains S, the greater thebumping effect, and for this reason I usually prefer to employ sprocketsof the least diameter usually made for the particular size of chainemployed.

Having described my invention and the best way now known to me ofcarrying the same into practical effect, I state in conclusion that I donot restrict myself to the structural details hereinbefore shown and setforth in illustration of my invention, for manifestly the same can bevaried considerably without departure from the spirit of my invention;but

VVhatI claim herein as new and desire to secure by Letters Patent is asfollows:

l. In a mixing or blending machine, a traveling power driven endlessapron, guides over and around which the same travels, and idler disks orwheels whereby the top ply of the apron is at a suitable point depressedIOO.

to form a concave constituting the bottom of a mixing trough, the headsor ends of which are formed by lsaid idler disks or wheels, the apron atthe rear of the mixing trough extending upwardly therefrom to form aback wall from which the adhering ingredients carried up along with thetraveling apron will by gravity fall back into the trough substantiallyas and for the purpose hereinbefore set forth.

2. In a mixing or blending machine an formed by a portion of the apronextending upwardly from the rear of the trough, and means for agitatingor shaking this back wall portion of the apron, substantially as and forthe purpose hereinbefore set forth. 8. In a mixing or blending machine,an endless traveling power driven apron and guides over and around whichthe same travels, idler disks or wheels which depress a portion of theupper ply of the apron into a concave forming the bottom of a mixingtrough, the ends of which are formed by said idler disks or wheels, thatportion of the apron in advance of the trough, in accordance with thedirection of travel of the apron, serving to convey material to, or tocarry it away from, the trough, and means whereby the direction ofmovement of the apron can be reversed at will, substantially ashereinbefore set forth.

4:. In combination with the back wall portion of the endless apronextending upwardly from the rear of the concave trough portion of saidapron, and the idler disks or wheels which form the ends of the trough,the idler knocker-sprocket wheels engaging the sprocket chains of theback wall portion of the apron, and deflecting the same out of astraight line substantially as and for the purposes hereinbefore setforth.

5. The endless power driven traveling apron, in combination with idlerdisks or wheels which depress a portion of the upper ply of the aproninto a concave constituting a mixing trough, the ends of which areformed by said idler disks or wheels, and power driven means wherebywhen the machine is in action the materials in the trough are constantlymoved from the ends toward the center of the trough, substantially asand for the purposes hereinbefore set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOSHUA J. GREEN.

Witnesses:

R. P. MOORE, ED SEAMAN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

